The level of spam postings in LinkedIn groups, particularly "get rich quick" postings and spam messages, is reaching the point where it will make the service unusable. LinkedIn's advice to group administrators is to change the member’s posting permissions and block offending members, but just as with email, it is not practical to deal with spam manually. LinkedIn needs to install an automatic spam filter. It should be reasonably simple to adapt a spam filter, such as the free open source, SpamAssassin, to work on LinkedIn postings and messages. The rate of increase in the spam from LinkedIn is such that it may be unusable within a few weeks.